Julia Roberts has a hit movie out and two more films on the way, but her biggest project at the moment is a bun in the oven.

Roberts is pregnant with her third child and will give birth next summer. The happy news comes as Roberts flies high in the nation’s No. 5 picture, "Charlotte’s Web," in which she provides the voice for the beloved spider.

Her pregnancy is somewhat of a surprise since the star, 39, had so much difficulty with her first effort to start a family with cameraman hubby Danny Moder, 37. In November 2004, she gave birth to twins Phinnaeus Walter and Hazel Patricia, but only after months of round-the-clock bed rest that followed a scare in which she was rushed to the hospital with false labor.

It’s not known how the Georgia-born beauty’s pregnancy will affect her latest screen projects. Roberts, who commands up to $25 million per movie, is appearing in Mike Nichols’ new flick, "Charlie Wilson’s War," and has reportedly signed to do "The Friday Night Knitting Club." But it’s likely she’ll take some time off, as she did when the twins were born. "It’s a joy being domestic. It’s something I want and something that makes me very happy," she once told an interviewer.

Moder and Roberts tied the knot in July 2002 at their sprawling ranch in Arroyo Seco, N.M., near Taos, after he’d dumped his makeup-artist wife of five years, Vera Steinberg, and Roberts had shed her longtime boyfriend, Benjamin Bratt.

Whether Roberts’ upcoming visit from the stork will be her last is anybody’s guess. She once told Oprah Winfrey that she and Moder wanted a big family, adding: "I’m in the harbor of my life. Danny has really shined the light for me."

Roberts’ bliss is eons away from the old days when she was a swinging bachelorette with such boyfriends as Kiefer Sutherland, Liam Neeson, Matthew Perry and Daniel Day-Lewis. There was also a blink-and-you’ll-miss-it marriage to Lyle Lovett.

Roberts’ spokeswoman, Marci Engelman, couldn’t be reached for comment.

Too bad it wasn’t a real tomato. Too bad it wasn’t thrown at Julia Roberts. Foods fights make theater more fun.